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AI coding assistants: what they are and who makes them

Cursor, GitHub Copilot, Claude Code and 6 more, sorted into types, with the company behind each and where it is based.

9tools compared
7with a free plan
3with API access
3headquarters countries

Types of AI coding assistants

AI-native editors

These are standalone editors built around the assistant, so completions, chat and multi-file agents share one interface. You switch editors to get them. Cursor and Devin Desktop (formerly Windsurf) are the main examples, and Kiro belongs here too with its spec-first workflow.

Plug-ins for the editor you have

These install into VS Code, JetBrains IDEs and others, so your keybindings, extensions and habits stay put. GitHub Copilot, JetBrains AI Assistant, Tabnine and Cline work this way. The trade-off is that the editor vendor controls how deeply the assistant can integrate.

Terminal and CLI agents

Terminal agents take a task, read the repository, run commands and hand back a diff, without needing a specific editor. Claude Code and the Codex CLI are the leading ones. They suit scripted and CI use, and they reward people comfortable reviewing diffs in git.

Cloud and background agents

Cloud agents clone your repository into a sandbox, work on a task for a while and open a pull request. Codex cloud, Claude Code on the web, Cursor's cloud agents and Copilot's cloud agent do this. They free your machine but need a connected repository and tolerant review habits.

Facts at a glance

ToolPublisherBased inAccess
Cursor AnysphereUnited StatesFree tier + API
GitHub Copilot GitHub (Microsoft)United StatesFree tier
Claude Code AnthropicUnited StatesPaid + API
OpenAI Codex OpenAIUnited StatesFree tier + API
Devin Desktop (formerly Windsurf) CognitionUnited StatesFree tier
Kiro Amazon Web ServicesUnited StatesFree tier
Cline ClineUnited StatesFree tier
JetBrains AI Assistant JetBrainsCzech RepublicFree tier
Tabnine Tabnine (acquired by Tricentis)IsraelPaid

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